FESEM, XRD and DRS studies of electrochemically deposited boron doped ZnO films

Çağlar, Yasemin; Ilıcan, Saliha; Çağlar, Müjdat

doi:10.1515/msp-2017-0091

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…The distortion degree represents the deviation of the crystal from a perfect arrangement, and it is accepted that R = 1 suggests that there is no distortion [52]. The dependence of R on the annealing temperatures is shown in Figure 8 for ZnO and ZnO:Mg films.…”

Section: Xrd Study-crystalization Behaviormentioning

confidence: 99%

Deposition of Sol–Gel ZnO:Mg Films and Investigation of Their Structural and Optical Properties

et al. 2022

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This work presents a facile sol–gel method for the deposition of ZnO and ZnO:Mg films. The films are spin coated on silicon and quartz substrates. The impact of magnesium concentrations (0, 0.5, 1, 2 and 3 wt%) and post-annealing treatments (300–600 °C) on the film’s structural, vibrational and optical properties is investigated. Undoped ZnO films crystallize in the wurtzite phase, with crystallite sizes ranging from 9.1 nm (300 °C) to 29.7 nm (600 °C). Mg doping deteriorates the film crystallization and shifting of 002 peak towards higher diffraction angles is observed, indicating the successful incorporation of Mg into the ZnO matrix. ZnO:Mg films (2 wt%) possess the smallest crystallite size, ranging from 6.2 nm (300 °C) to 25.2 nm (600 °C). The highest Mg concentration (3 wt%) results into a segregation of the MgO phase. Lattice constants, texture coefficients and Zn–O bond lengths are discussed. The diminution of the c lattice parameter is related to the replacement of Zn2+ by Mg2+ in the ZnO host lattice. The vibrational properties are studied by Fourier transform infrared (FTIR) spectroscopy. IR lines related to Mg–O bonds are found for ZnO:Mg films with dopant concentrations of 2 and 3 wt%. The optical characterization showed that the transmittance of ZnO:Mg thin films increased from 74.5% (undoped ZnO) to about 89.1% and the optical band gap energy from 3.24 to 3.56 eV. Mg doping leads to a higher refractive index compared to undoped ZnO films. The FESEM (field emission scanning electron microscopy) technique is used for observation of the surface morphology modification of ZnO:Mg films. The doped ZnO films possess a smoother grained surface structure, opposite to the wrinkle-type morphology of undoped sol–gel ZnO films. The smoother surface leads to improved transparency of ZnO:Mg films.

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Section: Xrd Study-crystalization Behaviormentioning

confidence: 99%

Deposition of Sol–Gel ZnO:Mg Films and Investigation of Their Structural and Optical Properties

et al. 2022

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“…Figure 5 illustrates the Curve (αhυ) 2 as a function of (hυ) for a pure PVC lm and samples made with various layers (15,20,25, and 30 layers) that are linear throughout a wide range of photon energies, con rming direct type transitions. The energy bandgap is determined by the intercepts (straight lines) of these plots on the energy axis [41].…”

Section: Determination Of Optical Band and Thicknessmentioning

confidence: 99%

The influence of the Samples thickness on the structural and optical properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films: Application in catalytic degradation of methylene blue dye.

Guedri¹,

Zaabat²,

Boudine³

et al. 2021

Preprint

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Considered Technique spin coating of the most important techniques used to prepare thin films because it is easy to use and inexpensive since it is closely dependent on the number of layers deposited. This work aims to study the effect of samples thickness for nanocomposites of polyvinyl chloride doped with zinc oxide nanoparticles on the structural, optical properties, and photocatalytic activities. Nanocomposite films of polyvinyl chloride (PVC) - zinc oxide (ZnO) with a different number of the deposited layers (15, 20, 25, and 30 layers) were synthesized by a sol-gel method (spin coating) using tetrahydrofuran as a solvent, and investigated by various techniques. X-ray diffraction measurements indicated in the case of 15, 20, and 25 layers do not clearly show the presence of diffraction peaks. On the other hand, in the case of 30 layers, the presence of several peaks is observed, which testify to the presence of ZnO crystallites of wurtzite structure in PVC films. The size of the crystallites is almost equal to 32 nm depending on the working conditions. Raman and infrared spectra confirmed the result of X-ray diffraction on the incorporation of ZnO crystallites in the films produced by showing peaks corresponding to the modes of vibration of the crystal lattice of the ZnO doping semiconductor. Optical transmittance spectra have shown that The layers obtained have an optical transmission varying from 75 to 86% in the visible region of the spectrum. The values of the band gap energies, determined from the transmission spectra for the films deposited on glass, vary between 3.45 and 3.94 eV. The Photoluminescence spectra of ZnO/PVC nanocomposites studied revealed a strong ultraviolet and green luminescence, attributed to structural defects in the zinc oxide. The photocatalytic reaction has been shown using MB in the UV irradiation action of films stacked in an MB solution. The result showed that the 30-layer (PVC / ZnO) sample gave an efficiency to remove MB of 79% at 60 min, Similar to other samples which gave a lower efficiency.

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“…where I(hkl) and I 0 (hkl) is the measured intensity and the standard intensity from the JCPDS data based of (hkl) plane respectively, and N is the diffraction peaks number. Generally, the value TC (hkl) = 1 reveals that the films are with randomly oriented grains, while values higher than the unity involve the riches of grains oriented in a given (hkl) direction [12].…”

Section: Structural and Morphological Propertiesmentioning

confidence: 99%

Investigation of the physical properties of nanostructured CO:NiO thin films

Ghougali¹,

Belahssen²,

Benhamida³

et al. 2021

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In this paper, the Co:NiO thin films were deposited on glass substrates under the temperature of (480°C) by spray pyrolysis technique )SPT), and their structural, electrical and optical properties were studied. The films prepared with a molar concentration of 0.2 mol/l from solutions of nickel nitrate and cobalt (II) chloride hexahydrate. The XRD results showed that the films have a fcc structure with preferred orientation (111). The optical band gap energy and Urbach energy were found ranging between 3.61 to 3.48 eV and 0.353 to 0.915 eV respectively. The maximum value of electrical conductivity was 0.08961 Ω-1.cm-1, it was obtained at 12 at.%.

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FESEM, XRD and DRS studies of electrochemically deposited boron doped ZnO films

Cited by 12 publications

References 23 publications

Deposition of Sol–Gel ZnO:Mg Films and Investigation of Their Structural and Optical Properties

Deposition of Sol–Gel ZnO:Mg Films and Investigation of Their Structural and Optical Properties

The influence of the Samples thickness on the structural and optical properties of Polyvinyl Chloride/Zinc Oxide Nanocomposite Films: Application in catalytic degradation of methylene blue dye.

Investigation of the physical properties of nanostructured CO:NiO thin films

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